Spin-transfer Motor

Abstract

The operation of conventional electric motors is based on the electromagnetic interaction between the coil and permanent magnet, and the size of these parts limits the miniaturization of these motors. Nano-motors, which generate driving force, are indispensable for achieving future nano-machines. We propose a novel rotary motor whose operating principle is based on the gyromagnetic effect due to electron spin, and this is accomplished by spin-injection and spin-relaxation. This spin-transfer motor makes ultimate miniaturization possible thanks to its simple structure.